E30 Zone

G'day all,
After test driving a 325 last weekend I feel the need to give my M20B23 Jetronc the flick in favour of a M20B25 Motronic

Can anyone point me in the direction of some useful information for carrying out this conversion.
TIA

Do the electric side of thing's first. If you run your b23 on the later 1.3 motronic set up, you will proberly find there is un-noticable difference between the two engines.

It's not much more effort to plonk your head onto a 2.7 eta is it? The etas seem to be reasonably plentiful in Oz from what I read on here. You should end up with 325i power and more torque with that set up, though maybe a 325i inlet/TB would be required - not difficult.

an M20B25 got listed on the 'Bay this morning...

happy to check it out if you want.

I'm thinking of a complete donor 325 - even have one lined up. Just wondering what is needed, ie. gearbox, exhaust, etc that needs alteration

as always, you have to decide how far to go.
A full blown 325i convo would need the engine and the Motronic 1.3 electrics, loom and ECU.
Grab the exhaust too. (i'll take the rear box if you don't need it)

ABS, oil cooler and 325i struts and dampers would be options.
Gearbox, prop and diff can stay,

Thanks Mark, just piecing things together at this stage.
The is very solid and on good nick with new struts and springs so would be looking at minimum engine / ECU / loom at this stage.
What about radiator and other ancillaries - how much can be retained?

poolnoodle just upgraded from M10 1800 to M20 2300 power is a sh#tload better but still don"t have the option of chipping,plus would also extract as much out of the M20as possible within reason.maybe the 325 efi/ecu might be worth considering,the 2.7 stroker would be the ultimate for me but the fund situation comes into play.